Memory cards Cisco

Cisco 7200 Compact Flash Disk for NPE-G1, 256 MB Option The CompactFlash Disk slots on the NPE-G1 and NPE-G2 network processing engines for the Cisco 7200 VXR routers, and the PC card slots on the I/O controllers and used with Cisco 7200 series routers, use three types of Flash memory options. The PC card slots on the I/O controllers and CompactFlash Disk slots on the NPE-G1 and Cisco uBR7200 series universal broadband routers also use three types of Flash Memory options. These options as follows:

-CompactFlash Disks. CompactFlash Disks are smaller in size than Flash Disks but provide the same ATA interface and equivalent functionality.

-Flash Disks, also known as Flash Memory Disks. Flash Disks are Flash memory-based devices that conform to the PC card standard (formerly called Personal Computer Memory Card International Association or PCMCIA) and present an ATA (AT Attachment) interface to the system. This interface complies with the ANSI ATA Interface Document X3T13.1153 D Rev. 9 specification. These cards provide from 48 MB to 256 MB of storage space.

The Flash Disk is more flexible than linear Flash memory because the Flash Disk has controller circuitry that allows it to emulate a hard disk and automatically maps out bad blocks and performs automatic block erasure. The Flash Disk also provides the capability to allocate noncontiguous sectors, which eliminates the need for the squeeze command (which is required with linear Flash memory cards to recover the space used by deleted files).

The Flash Disk also supports the Cisco IOS File System feature, which provides a single interface to all of the router's file systems, including the Flash Disks and onboard Flash memory, as well as network file systems such as File Transfer Protocol (FTP) and Trivial FTP (TFTP) servers.

-Linear Flash Disks, also known as PC cards, were the initial PC card used for the routers and are available in 16 MB and 20 MB sizes.